qutech.nl

Checked 22 October 2026, 15:31 UTC · via 8.8.8.8
!Passed with warnings
19 passed 4 warnings 0 failed 6 info

Registration

info

.nl country-code

Found

TLD
.nl (country-code)
ICANN policies apply
no
Lookup error: https://rdap.sidn.nl/domain/qutech.nl returned HTTP 429

Checks

  • i
    .nl is a country-code TLD (ccTLD)
    Country-code TLD: governed by its local registry under national policy, not by an ICANN contract. Registrar accreditation, dispute resolution and RDAP/WHOIS rules are set by the registry.
    #1
  • ✓ TLD delegated and signed #2
    .nl is delegated in the root zone and DNSSEC-signed.
  • i
    Could not be checked
    The RDAP lookup failed, so this could not be checked: https://rdap.sidn.nl/domain/qutech.nl returned HTTP 429
    #3

Delegation

warn

ns1.tudelft.nl, ns2.tudelft.nl

Found

Parent zone
nl
Delegation from
ns1.dns.nl (194.0.28.53)
NS at the parent
ns1.tudelft.nl, ns2.tudelft.nl
NS in the zone
ns1.tudelft.nl, ns2.tudelft.nl
NameserverAddressesNetwork (AS)Glue
ns1.tudelft.nl130.161.180.1AS1128 TUDELFT-NL - SURF B.V., NL130.161.180.1
ns2.tudelft.nl130.161.180.65AS1128 TUDELFT-NL - SURF B.V., NL130.161.180.65

Checks

  • i
    2 nameservers
    Two nameservers meet the minimum; RFC 2182 recommends three or more for important zones: ns1.tudelft.nl, ns2.tudelft.nl.
    #6
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ No glue needed #8
    All nameservers are outside the zone, so no glue records are needed.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • !
    Nameservers in one network
    all IPv4 addresses are in 130.161.180.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).
    #10
  • i
    All nameservers in one AS
    All nameserver addresses are announced by one network operator (AS1128 (TUDELFT-NL - SURF B.V., NL): 2 addresses). An outage or attack on that network affects all nameservers; large anycast providers mitigate this, but a secondary DNS provider adds independence.
    #11
  • i
    All nameserver names under .nl
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • !
    No IPv6
    None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.
    #13

Nameservers

pass

2 of 2 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.tudelft.nl 130.161.180.1NOERROR, 11 ms, authoritativenoyes / yesrefused-
ns2.tudelft.nl 130.161.180.65NOERROR, 12 ms, authoritativenoyes / yesrefused-

Checks

  • ✓ All respond #14
    All 2 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • ✓ No version disclosed #17
    The nameservers don't reveal their software version.
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 51 · primary ns1.tudelft.nl

Found

Primary (MNAME)
ns1.tudelft.nl
Contact (RNAME)
hostmaster.tudelft.nl
Serial
51
Refresh / retry
10800 s / 3600 s
Expire
604800 s
Negative TTL
86400 s

Serial per nameserver

NameserverSerial
ns1.tudelft.nl (130.161.180.1)51
ns2.tudelft.nl (130.161.180.65)51

Checks

  • ✓ Serial 51 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 3h, retry 1h, expire 7d, negative TTL 1d.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.tudelft.nl is one of the listed nameservers.
  • ✓ Contact hostmaster@tudelft.nl #25
    The SOA RNAME hostmaster.tudelft.nl means hostmaster@tudelft.nl.
  • ✓ Counter serial #26
    The serial 51 is a plain counter.

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

warn

9 records at the apex

Found

Read from
130.161.180.1:53
TypeValueTTL
SOAns1.tudelft.nl. hostmaster.tudelft.nl. 51 10800 3600 604800 8640030
NSns1.tudelft.nl.30
NSns2.tudelft.nl.30
A131.180.77.13530
MX10 qutech-nl.mail.protection.outlook.com.30
TXT"MS=ms14933653"30
TXT"v=spf1 include:_spf.mailersend.net ip4:130.161.131.5 ~all"30
TXT"HARICA-uH7N9M1iiclepdshVwy"30
TXT"google-site-verification=P7i7Cnom_ZotgTSX15cR8bu_S-PALBKX0b96Iowob-0"30

Checks

  • !
    Very low TTLs
    These records have a TTL below 5m, causing extra queries and slower lookups: A (30s), MX (30s), NS (30s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 30s; resolvers may use either.
    #32
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • i
    No CAA records
    Without CAA records any certificate authority may issue certificates for this domain. A CAA record limits issuance to the CAs you use.
    #35